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<br />o <br />(~j <br />l- <br />I.. <br />CO <br />c} <br /> <br />Habitat Mapping <br /> <br />Annually, digital aerial photography or videography will be obtained for the San Juan <br />River between RM 180 and RM 0 and printed at an approximate scale of200 ftJinch. Thirty-eight <br />categories of aquatic habitat (Table 2) will be mapped in the field utilizing the digital imagery as a <br />base map. The flights and mapping will be completed as soon after spring runoff as flows reach <br />1,000 cfs or less and weather will permit. Field mapping will be completed at flows between 500 <br />and 1,000 cfs. Digital imagery or aerial photography will be obtained from Navajo Dam (RM <br />225) to Lake Powell (RM 0) every fifth year. <br /> <br />Mapping will be completed for 2 of every 3 river miles, matching the areas sampled during <br />annual large-bodied fish monitoring. Mapping will be completed in the autumn with an attempt to <br />map at flows between 500 and 1,000 cfs and close to the time the autumn fish monitoring is <br />completed. Every fifth year, the entire 225 miles of river will be field mapped during autumn. <br /> <br />Field mapping will be entered into a Geographic Information System (GIS) for analysis to <br />produce coded polygons (habitats) for which surface areas are eomputed and sorted individually. The <br />data will then be retrieved and analyzed by cross-tabulation of the factors being correlated (eg., <br />habitat area by river mile). These data will be processed and summarized annually. Every 5 years, <br />the flow-habitat relationships will be re-examined and updated and trends in habitat change <br />characterized. Geographic Infonnation System coverage of the habitat mapping will be produced and <br />included in the database on an annual basis. <br /> <br />Water Temperature <br /> <br />Water temperature monitors will be maintained on the San Juan River at Navajo Dam, <br />Archuleta, Farmington, Shiprock, Four Comers, Montezuma Creek and Mexican Hat and on the <br />Animas River at Farmington. Data (daily maximum, minimum, and average) will be downloaded <br />twice yearly and summarized and plotted annually, <br /> <br />Water Quality <br /> <br />Twelve water quality monitoring sites (Table 3) have been identified as important to <br />characterize water quality conditions in the San Juan River and key tributaries. The sampling interval <br />will be quarterly (trimonthly), February, May, August and November. This temporal spacing was <br />adopted to ensure that water sampling occurs during spring runoff in the upper portion of the San <br />Juan Riverbasin and during winter base flow conditions. <br /> <br />12 <br /> <br />Dr:ill Long Term Monitoring Plan - SJRJP Biology Committee <br />